Hydrogen code stubs for vector-based ICs.

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arm/lithium-codegen-arm.h"
 #include "src/arm/lithium-gap-resolver-arm.h"
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 2978 matching lines @@
     __ cmp(result, ip);
     DeoptimizeIf(eq, instr, "hole");
   }
 }
 
 
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   DCHECK(FLAG_vector_ics);
   Register vector_register = ToRegister(instr->temp_vector());
+  Register slot_register = VectorLoadICDescriptor::SlotRegister();
   DCHECK(vector_register.is(VectorLoadICDescriptor::VectorRegister()));
+  DCHECK(slot_register.is(r0));
+
+  AllowDeferredHandleDereference vector_structure_check;
   Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
   __ Move(vector_register, vector);
   // No need to allocate this register.
-  DCHECK(VectorLoadICDescriptor::SlotRegister().is(r0));
-  int index = vector->GetIndex(instr->hydrogen()->slot());
-  __ mov(VectorLoadICDescriptor::SlotRegister(), Operand(Smi::FromInt(index)));
+  FeedbackVectorICSlot slot = instr->hydrogen()->slot();
+  int index = vector->GetIndex(slot);
+  __ mov(slot_register, Operand(Smi::FromInt(index)));
 }
 
 
 void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->global_object())
              .is(LoadDescriptor::ReceiverRegister()));
   DCHECK(ToRegister(instr->result()).is(r0));
 
   __ mov(LoadDescriptor::NameRegister(), Operand(instr->name()));
@@ skipping 960 matching lines @@
 
 
 void LCodeGen::DoTailCallThroughMegamorphicCache(
     LTailCallThroughMegamorphicCache* instr) {
   Register receiver = ToRegister(instr->receiver());
   Register name = ToRegister(instr->name());
   DCHECK(receiver.is(LoadDescriptor::ReceiverRegister()));
   DCHECK(name.is(LoadDescriptor::NameRegister()));
   DCHECK(receiver.is(r1));
   DCHECK(name.is(r2));
-
-  Register scratch = r3;
-  Register extra = r4;
-  Register extra2 = r5;
-  Register extra3 = r6;
+  Register slot = FLAG_vector_ics ? ToRegister(instr->slot()) : no_reg;
+  Register vector = FLAG_vector_ics ? ToRegister(instr->vector()) : no_reg;
+  Register scratch = r4;
+  Register extra = r5;
+  Register extra2 = r6;
+  Register extra3 = r9;
+  DCHECK(!FLAG_vector_ics ||
+         !AreAliased(slot, vector, scratch, extra, extra2, extra3));
 
   // Important for the tail-call.
   bool must_teardown_frame = NeedsEagerFrame();
 
-  // The probe will tail call to a handler if found.
-  isolate()->stub_cache()->GenerateProbe(masm(), instr->hydrogen()->flags(),
-                                         must_teardown_frame, receiver, name,
-                                         scratch, extra, extra2, extra3);
+  if (!instr->hydrogen()->is_just_miss()) {
+    DCHECK(!instr->hydrogen()->is_keyed_load());
+
+    // The probe will tail call to a handler if found.
+    isolate()->stub_cache()->GenerateProbe(
+        masm(), Code::LOAD_IC, instr->hydrogen()->flags(), must_teardown_frame,
+        receiver, name, scratch, extra, extra2, extra3);
+  }
 
   // Tail call to miss if we ended up here.
   if (must_teardown_frame) __ LeaveFrame(StackFrame::INTERNAL);
-  LoadIC::GenerateMiss(masm());
+  if (instr->hydrogen()->is_keyed_load()) {
+    KeyedLoadIC::GenerateMiss(masm());
+  } else {
+    LoadIC::GenerateMiss(masm());
+  }
 }
 
 
 void LCodeGen::DoCallWithDescriptor(LCallWithDescriptor* instr) {
   DCHECK(ToRegister(instr->result()).is(r0));
 
-  LPointerMap* pointers = instr->pointer_map();
-  SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
+  if (instr->hydrogen()->IsTailCall()) {
+    if (NeedsEagerFrame()) __ LeaveFrame(StackFrame::INTERNAL);
 
-  if (instr->target()->IsConstantOperand()) {
-    LConstantOperand* target = LConstantOperand::cast(instr->target());
-    Handle<Code> code = Handle<Code>::cast(ToHandle(target));
-    generator.BeforeCall(__ CallSize(code, RelocInfo::CODE_TARGET));
-    PlatformInterfaceDescriptor* call_descriptor =
-        instr->descriptor().platform_specific_descriptor();
-    __ Call(code, RelocInfo::CODE_TARGET, TypeFeedbackId::None(), al,
-            call_descriptor->storage_mode());
+    if (instr->target()->IsConstantOperand()) {
+      LConstantOperand* target = LConstantOperand::cast(instr->target());
+      Handle<Code> code = Handle<Code>::cast(ToHandle(target));
+      __ Jump(code, RelocInfo::CODE_TARGET);
+    } else {
+      DCHECK(instr->target()->IsRegister());
+      Register target = ToRegister(instr->target());
+      // Make sure we don't emit any additional entries in the constant pool
+      // before the call to ensure that the CallCodeSize() calculated the
+      // correct
+      // number of instructions for the constant pool load.

[Jakob Kummerow, 2014/12/09 16:59:27]

nit: join this into the previous line (again below)

+      {
+        ConstantPoolUnavailableScope constant_pool_unavailable(masm_);
+        __ add(target, target, Operand(Code::kHeaderSize - kHeapObjectTag));
+      }
+      __ Jump(target);
+    }
   } else {
-    DCHECK(instr->target()->IsRegister());
-    Register target = ToRegister(instr->target());
-    generator.BeforeCall(__ CallSize(target));
-    // Make sure we don't emit any additional entries in the constant pool
-    // before the call to ensure that the CallCodeSize() calculated the correct
-    // number of instructions for the constant pool load.
-    {
-      ConstantPoolUnavailableScope constant_pool_unavailable(masm_);
-      __ add(target, target, Operand(Code::kHeaderSize - kHeapObjectTag));
+    LPointerMap* pointers = instr->pointer_map();
+    SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
+
+    if (instr->target()->IsConstantOperand()) {
+      LConstantOperand* target = LConstantOperand::cast(instr->target());
+      Handle<Code> code = Handle<Code>::cast(ToHandle(target));
+      generator.BeforeCall(__ CallSize(code, RelocInfo::CODE_TARGET));
+      PlatformInterfaceDescriptor* call_descriptor =
+          instr->descriptor().platform_specific_descriptor();
+      __ Call(code, RelocInfo::CODE_TARGET, TypeFeedbackId::None(), al,
+              call_descriptor->storage_mode());
+    } else {
+      DCHECK(instr->target()->IsRegister());
+      Register target = ToRegister(instr->target());
+      generator.BeforeCall(__ CallSize(target));
+      // Make sure we don't emit any additional entries in the constant pool
+      // before the call to ensure that the CallCodeSize() calculated the
+      // correct
+      // number of instructions for the constant pool load.
+      {
+        ConstantPoolUnavailableScope constant_pool_unavailable(masm_);
+        __ add(target, target, Operand(Code::kHeaderSize - kHeapObjectTag));
+      }
+      __ Call(target);
     }
-    __ Call(target);
+    generator.AfterCall();
   }
-  generator.AfterCall();
 }
 
 
 void LCodeGen::DoCallJSFunction(LCallJSFunction* instr) {
   DCHECK(ToRegister(instr->function()).is(r1));
   DCHECK(ToRegister(instr->result()).is(r0));
 
   if (instr->hydrogen()->pass_argument_count()) {
     __ mov(r0, Operand(instr->arity()));
   }
@@ skipping 1862 matching lines @@
   __ Push(scope_info);
   __ push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal